The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Systems Architecture’ Category

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Katie Anderson on Twitter: “Saw this on Facebook and it’s my new favorite PaaS (Pizza as a Service) breakdown”

Posted by jpluimers on 2021/11/30

Legacy/IaaS/PaaS/SaaS explained by “Pizza as a service”: from home made, take and bake, pizza delivery to full dining out.

[Archive.is] Katie Anderson on Twitter: “Saw this on Facebook and it’s my new favorite PaaS (Pizza as a Service) breakdown https://t.co/INKKG9UOAK” / Twitter

–jeroen

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Posted in Cloud, Conference Topics, Conferences, Development, Event, Infrastructure, Software Development, Systems Architecture | Leave a Comment »

Some links on data bias

Posted by jpluimers on 2021/11/25

[Archive.is] NL_Wetenschap on Twitter: “Er zijn inderdaad veel manier waarop data gebiased kan zijn, zeker in dit soort contexten. Heel veel van dit soort oplossingen staan of vallen met hoe goed mensen zich er van bewust zijn dat data nooit een ‘gegeven’ is maar gemaakt wordt.” / Twitter

[Wayback/ThreadreaderApp]

Er zijn inderdaad veel manier waarop data gebiased kan zijn, zeker in dit soort contexten. Heel veel van dit soort oplossingen staan of vallen met hoe goed mensen zich er van bewust zijn dat data nooit een ‘gegeven’ is maar gemaakt wordt.https://twitter.com/jpluimers/status/1348550923958804480

Data is nooit een doorgeefluik van de werkelijkheid, we máken data. We kiezen ervoor om iets te tellen bijvoorbeeld, en maken keuzes in wat wel en niet meegenomen wordt. Tot op zekere hoogte is dat arbitrair (goede nieuws: daar kunnen we wel verantwoording over afleggen!). 
Met dat in het achterhoofd is een eerste stap om je sterk afvragen wat zegt deze data wel en vooral ook niet. En vervolgens: wat kunnen/mogen/willen we hier dan wel of niet mee? Wat betekenen deze keuzes voor gebruikers of burgers? 
Welke normen en waarden zitten er ‘verstopt’ in of achter de data? Op wie heeft de inzet van die data effect en in welke mate? 
Misschien vindt je boek ‘Automating Inequality’ van Virginia Eubanks interessant. Ook mijn collega @GerwinSchie doet naar dit soort dingen onderzoek. Zie bijvoorbeeld:

Background reading:

–jeroen

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Posted in Development, Software Development, Systems Architecture | Leave a Comment »

What is “deleted” in an information system?

Posted by jpluimers on 2021/11/25

I have had quite a few discussions about data being “deleted” in information systems.

Often, data – despite GDPR – isn’t, or can’t be deleted for many reasons, especially when data is retained on backups, cloud storage is involved or data has been copied in other ways.

Many times, marking with a flag that data is deleted, is enough, but often it isn’t and then you need processes to track down all occurrences of the data and delete it permanently, which can be a tedious job.

Some more interesting thoughts are in this thread that triggered me:

Comment from discussion ga_zoinks_bo’s comment from discussion "All Parler user data is being downloaded as we speak!".

Posted in Development, Software Development, Systems Architecture | Leave a Comment »

How many dependencies does your development eco system have?

Posted by jpluimers on 2021/02/03

About 5 years after the disaster around npm and left-pad, I wonder

  1. how many dependencies on packages or libraries your software has,
  2. how many of them have a good or excellent test suite,
  3. how many of these you are in full control of determining the exact version used and the location it is uses from.

The disaster was well phrased in [WayBack] NPM & left-pad: Have We Forgotten How To Program? – David Haney – Blogging my experiences as a developer and engineering manager. of which these topics:

  • Functions are not packages
  • Third party problems
  • Strive for few dependencies

and these quotes:

  • React, Babel, and a bunch of other high-profile packages on NPM broke. The reason they broke is rather astounding:A simple NPM package called left-pad that was a dependency of their code.
  • some of the things that I observed:
    • There’s a package called isArray that has 880,000 downloads a day, and 18 million downloads in February of 2016. It has 72 dependent NPM packages. Here’s its entire 1 line of code:return toString.call(arr) == '[object Array]';
    • There’s a package called is-positive-integer (GitHub) that is 4 lines long and as of yesterday required 3 dependencies to use. The author has since refactored it to require 0 dependencies, but I have to wonder why it wasn’t that way in the first place.
    • A fresh install of the Babel package includes 41,000 files
    • A blank jspm/npm-based app template now starts with 28,000+ files
  • frameworks create a “core” library of basic functionality. Such a library is vetted by the creators of the language and pretty much guaranteed to be correct and bug-free.
  • if you cannot write a left-pad, is-positive-integer, or isArray function in 5 minutes flat (including the time you spend Googling), then you don’t actually know how to code. Any of these would make a great code screening interview question to determine whether or not a candidate can code.
  • Take on a dependency for any complex functionality that would take a lot of time, money, and/or debugging to write yourself. Things like a database access layer (ORM) or caching client should be dependencies because they’re complicated and the risk of the dependency is well worth the savings and efficiency.
  • ask the React team how well their week has been going, and whether they wish they had written those 11 lines for left-padding a string themselves.

Via: [WayBack] “There’s a package called isArray that has 880,000 downloads a day, and 18 million downloads in February of 2016. It has 72 dependent NPM packages. Here… – Elke Stangl (elkement) – Google+

Related:

–jeroen

Posted in Design Patterns, Development, Software Development, Systems Architecture | Leave a Comment »

Spinettaro’s Blog: Delphi Flux application architecture

Posted by jpluimers on 2020/12/16

On my list of things to try: [WayBack] Spinettaro’s Blog: Delphi Flux application architecture.

It is about a Delphi implementation of the Facebook Flux application architecture.

Related:

Via: [WayBack] Delphi Flux application architecture A good application architecture Finding a good application architecture is not easy, but defining an architecture f… – Daniele Spinetti – Google+

Note that by using the [WayBack] CodeRage 2018 Replay | Embarcadero Academy, you are disallowed using any of what you learn in a commercial way.

Embarcadero evangelists told the public that for the Community Edition, similar terms would not be upheld, but then the sales department started sending out nasty emails to people registering Community Edition using their work email address.

[WayBack] https://www.embarcaderoacademy.com/p/terms:

under this license you may not:

  1. modify or copy the materials;
  2. use the materials for any commercial purpose, or for any public display (commercial or non-commercial);
  3. attempt to decompile or reverse engineer any software contained on the School’s web site;
  4. remove any copyright or other proprietary notations from the materials; or
  5. transfer the materials to another person or ‘mirror’ the materials on any other server.

–jeroen

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Posted in Delphi, Development, JavaScript/ECMAScript, Scripting, Software Development, Systems Architecture, TypeScript | Leave a Comment »

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